Abstract
The statical characteristics of combined joints of next cases are investigated more minute by than former experiments which were performed last year. i) High strength bolt and fillet weld ii) Rivet and high strength bolt It becomes clear as the results of the research as follows : The ultimate strength of combined joint of first case is calculated as the 0.9 times value of the sum of slip load of high strength bolts and the ultimate strength of fillet weld. The ultimate strength of combined joint of second case is calculated simply by the sum of the ultimate strength of bolt kind of fasteners. According to those results and the behaviour of the joints, it is concluded that the design of combined joints of those types may be based on the allowable strength of each joining elements. The ultimate strength of combened joint of rivets and fillet weld is calclated by sum of the slip load of rivets and the ultimate strengt of fillet weld. But the slip load of rivets is very uncertain, because it depends upon the condition of rivetting procedure. So it is neccessary to investigate the combined joints of this type more miulltely before use of this type of joints.
